When I kept silence, my bones waxed old through my roaring all the day long. For day, and night Thy hand was heavy upon me: my moisture is turned into the drought of summer. -Psalm 32:3-4

 David here describes a very common experience amongst convinced sinners. He was subjected to extreme terrors and pangs of conscience. These terrors were continual; they scared him at night with visions, they terrified him all day with dark and gloomy forebodings….His pain was so extreme, that when he resorted to prayer he could scarcely utter an articulate word. There were groanings that could not be uttered within his spirit; and hence he calls his prayer a “roaring all the day long.” Wherever he was, his spirit seemed to be always sighing, sending a full torrent of melancholy groans upwards towards God.  So far did this groaning proceed, that at last his bodily frame began to show evidences of it. He grew old, and that not merely in the lines of the countenance and the falling in of the cheeks, but his very bones seemed as if they partook of the suffering…here was a man who did not show merely externally, but even internally, the heavy pressure of grief, on account of sin…So intimate is the connection between the body and the soul, that when the soul suffers extremely, the body must be called to endure its part of grief…We gather from what David says in this Psalm, and indeed in all these seven penitential Psalms, that his convictions on account of his sin with Bathsheba, and his subsequent murder of Uriah, were of the deepest and most poignant character, and that the terrors he experienced were indescribable, filling his soul with horror and dismay.

…Remember, sinner, it is God that is dealing with you; when you lay dead in your sins He looked on you, and now He has begun not only to look, but to smite; He is now wounding you with the design of afterwards making you whole; He is killing you that He may afterwards make you spiritually alive. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0313.cfm